Research On Model Development And Simulation Of Recycling Of Logistics Package Based On System Dynamics Methodology

Reverse logistics of logistics packaging is the flowing process of logistics packaging containers and materials from downstream to upstream in the supply chain.Through ways of recovery,detection,classification,repair,reprocessing and recycling,the value of packaging wastes is realized and the cost of transportation and packaging is reduced,and meanwhile,the utilization ratio of resource is increased.Along with the development of the logistics industry and the e-commerce industry,the demand for logistics packaging is increasing.At this stage,the recycling enthusiasm is not high,and the recycling system and channels are unreasonable and unsmooth,resulting in a large amount of packaging wastes.Traditional recycling channels are mainly in the form of garbage clearance.Most packaging wastes are not recycled,but directly incinerated or landfilled,which results in potential resource wastes and environmental pollution.The state has introduced a series of policies to encourage logistics companies,waste collectors,and manufacturers to collect and recycle packaging materials.Therefore,researches on logistics packaging recycling are of great theoretical and practical significance.This dissertation takes logistics packaging as the research object which includes waste plastic pallets and general packaging.Firstly,on the basis of literature analysis,this paper summarizes the problems present in the current logistics packaging industry and several major types of green packaging materials from the qualitative point of view.In addition,the recycling system of IoT integrated logistics packaging is constructed,which provides a reference for how to improve and perfect the current logistics packaging recycling system.Secondly,based on the theoretical basis of reverse logistics,closed-loop supply chain and system dynamics,Vensim PLE software is used to construct the system dynamics models of waste plastic pallets recycling and the dual-channel packaging recycling,and the validity and rationality of the model are verified by the relevant tests.According to the actual data and the hypothetical parameters,the paper analyzes the impact of different rebate ratios and environmental taxes on the recycling of waste plastic pallets.Specifically,the paper conducts a simulation analysis on the advantages and disadvantages of the dual-channels,namely channel 2(using the Internet of Things intelligent recycling machine)and channel 1(traditional decentralized recycling vendors without intelligent collecting machines)in packaging recycling,and makes a series of sensitivity analyses.The research shows that from the perspective of environmental protection,the combination of high rebate ratio and high environmental tax policy has a positive effect on increasing the recovery speed and reducing the production of packaging waste;however,the combination of high rebate ratio and high environmental tax policy is uneconomical.The low rebate ratio and high environmental tax policy have a positive effect on improving recycling profits.When the service life of plastic pallets is relatively extended,the amount of pallet scrap,recovery speed,recycling profit and waste incineration will decrease.Low recovery rate is not very sensitive to cost,profit and market price while high recovery rate will be easily affected by market price variations.Compared to the traditional decentralized recycling vendors,the Internet of Things recycling machine has obvious advantages in terms of recovery speed and recycling profit,and the effect of reducing waste incineration is stable and continuous.When the recovery rate is gradually increased,the cost advantage of the dispersed recycling vendor will be gradually weakened.The proportion of rebates has a greater impact on the recovery of high-value packaging and has little impact on low-value packaging.